Loose or floating bearing bush



June 19, .1928.

T. SLOPER LOOSE 0 FLOATING BEARING BUSH Filed Dec. 31, 1926 INVENTOR FMM Patented dune i9, i928; r ll fl% fi@& entree stars earns oasis,

THOMAS SLOPER, E WILTSHI RE, ENGLAND.

LOOSE 0R FLOATING BEARING BUSH.

Application filed December 31, 1926, Serial No. 158,240, and in Great Britain fi'cbruary 3, 1926.

This invention consists in improvements In the preferred way of carrying out this in or relating to loose or floating bearinginvention, as applied for example to bearbushes havingexterior and interior bearing ing-bushes for aircraft wheel hubs of th supfaces t pe described in the specification of United 60' ,5 Prior to this invention the interior suralles Patent No. 1,313,646, the interior and faces of bearing-bushes of the type described terioI bearing surfaces of the bearinghave been provided for lubricating purposes hu h have ea h two endless grooves the with one or more endless grooves, the path path of each said grooveextendin circumof said groove or path of each of said ferentially around said bearing surfac trav- 65 grooves lying at right angles to the throughg subs ant al portion 0f the length wa axis of the bearing-bush. thereof, and crossing at one or more points With bearing-bushes having lubricating h path of each of the other grooves in grooves as described it has been found that h in erim and eXterior bearing surfaces, the shafts upon which the said bearingalhsaid gr intel'wmll'lunicating Where 70 bushes rotate are liable to become ridged and h P h CI'OSS- worn unevenly. Further, with such grooves The ac mpanying drawings show by way the lubricant is localized and not distributed of p e W nstructions according to over the whole bearing surface of said bush. the invention 111 these d ngs:

According to this invention a loose or Figure 1 is elevation of a g- 11 11 75 floating bearing-bush having interior and for an aircraft wheel hub as described in exterior bearing surfaces has its interior the p ifica n of United States Patent No. bearing surface and/or its exterior bearing 1,313,646 d OWS the preferred arrangesurface provided with one or more endless Of g Q r ng to this invention. grooves having a cam-like path or cain-like g r 2 1S Sectional ViEW 01c the Same 80 25 paths extending circumferentially 'there-- g-b z k non the line 2-2 of Figaround. lire i I BycaInJike path as herein used is meant Figure 3 is a sectional view of a modifia path of which a substantial portion decationand shows another way of carrying parts substantially from a plane in which out th1s invention. 85 any point of said path lies,'the said plane Referring to Figures 1 and 2, the interior being at right angles to the axis of the beara and exterior bearing surfaces of the bearing-bush. ing-bush are indicated by A'and B respec- Preferably the said endless groove or tively'. Each of said bearing surfaces has grooves has or have'a path or paths which two endless grooves A, A and B 13 re- 0 traverses or traverse a substantial portion spectively, the path of each of said grooves of the length of the said bearing surface extending circumferentially around the or bearing surfaces. bearing surface in which it is provided. The

Preferably both the exterior and the inpaths of the grooves A and A traverse in terior bearing surfaces are provided with opposite directions 'ver nearly the Wholeg 40 the said grooves, the path or paths of the length of the interior bearing surface and groove or grooves of the interior bearing cross at two points, only one A of which is surface crossing the path or paths of the shown in the drawings. The path of the groove or grooves of the exterior bearing grooves 13 and B likewise traverse in opposurface. site directions very nearlythe whole length 100 4 The said exterior and interior grooves of the exterior bearing surface Band cross may intercoinrnunicate where their paths atpoints B and B4. The paths of the cross. Conveniently the sum of the depths grooves A and A are positioned and. arof the said exterior and interior grooves is ranged so as to cross the paths of the grooves equal to or greater than the thickness of B and E the path of each groove'A and 05 the bearing-bush so that a hole or holes are A crossing the path of each groove B and formed therethrough wherethe paths of said B at two points and the grooves intercomgl-ooves cross inunicating at said points. Q C C C,

Where two or more grooves are provided C C 1ndicate s1x of the eight points at on a bearing surface, the paths of said which the interior and exterior grooves in 110 grooves may be arranged to cross at one or tercommumcate. The communication bemore points. tween said exterlor and interior grooves 1s their rotating member in tioned. In the bearing-bush of Figures 1 grooves as set forth. in

I approximately of t surface of a bearing-bush, the said lubricant reaching themunicate.

effected in the example shown by making said grooves of such depth that the sum of depths is approximately equal to the thickness of the bearing bush. If'it is desired to make the grooves of less depth than the aforesaid, holes may be drilled through the intervening material to provide the intercommunication. The endless groove D is provided to receive the spring-controlled ball-detent for retaining the bush in a wheel- 'hub as described in prior specification.

the I beforementioned In Figure 3 which shows another bearingbush according to'this invention, the interior bearing surface E has three endless grooves E E and E having cam-like paths extending circumferentially therearound, and the exterior bearing surface F has three similar grooves F F and F It will be seen that in this case none of the grooves intercommunicate.

It will be realized that the number and pathsof the grooves depends on the length of bearing surface to be lubricatedand the conditions under which the bearing is used.

, In some cases a single endless groove having a cam-like path traversing the greater portion of the length of the bearing-surface and extending circumferentially therearound will be sufficient. The construction shown in Figures 1 and 2 has, however, been found to be the most suitable for a bearing-bush he proportions shown and for the purpose referred to.

. If desired a feeding groove may be provided on the interior or exterior bearing feeding groove extending fromthe inward side of the bearing-bush to one or more of the endless grooves for the purpose of supplying rease or other lubricant to the bearing-bush from the interior of the wheel-hub or other which the bush is posiand 2 the feeding groove would be provided .on the interior bearing surface,,the exterior grooves and bearing surface through the points at which the interior and exterior grooves intercom- It has been found that bearing-bushes with this invention do not produce rid es on the shafts on which they rotate and irther cause. the lubricant su lied to the bush to be distributed over tl fe aring surface thereof path to retain the bush ,in a more uniform manner than heretofore.

It will be appreciated that many different applications and constructions of-this invention may be made without departing from the scope thereof .as defined in the appended claims. T

I claim:

1. A floating bearing-bush having interior and exterior bearing surfaces in which each of said bearing surfaces is provided with at least one endless groove having a cam-like extending around, and in which the communicate where their paths cross.

2. A floating bearing-bush having interior and exterior bearin surfaces in which each of said bearing surf least one endless groove having a cam-like path extending circumferentially therearound, and in grooves on the exterior and the interior hearing surfaces cross and the sum of the depths of the exterior and the .interiorgrooves is at least equal to the thickness of the bearingbush so that an opening is formed therethrough at each point where said paths cross 3. A floating bearing-bush having interior and exterior bearing surfaces in which each bearing surface'has two endless grooves, the path of each said groove extends circumferentially around the bearing surface on which it is provided, traverses a substantial portion of the length thereof, crosses the path of each of the other grooves on both the interior and exterior'bearing surfaces, and all 'saidgrooves intercommunicate where their paths cross, g

4. In or for an air-craft wheel hub a loose or fioating bearing bush having interior and exterior bearing surfaces in which each bearing surface has two endless g ooves, the path of each said groove extends circumferentially' around the bearing surfaceon which it is provided, traverses a substantial portion of endless circumferential groove is provided in the exterior bearing surface adapted to co operate with means on the, wheel hub in which the bush is, or is t0 b'e,fitted in order rotatably therein.

In testimony whereof I afiix my signature.

I THOMAS sLoP n.

circumferentially theregrooves on the'extenor and the interior bearing surfaces interaces is provided with at path of each of the other grooveswhich the paths of the 

